300 INDEX TO AMERICAN BOTANICAL LITERATURE 
Thompson, W. P. Ray tracheids in Abies. Bot. Gaz. 53: 331-338. 
pl. 24, 25. 15 Ap 1912. 
Trelease, W. The agaves of Lower California. Ann. Rep. Missouri 
Bot. Gard. 22: 37-65. pl. 18-72. 14 F 1912. 
Trelease, W. Revision of the agaves of the group Applanatae. Ann. 
Rep. Missouri Bot. Gard. 22: 85-97. pl. 73-99. 14 F 1912. 
Ulrich, E. B. Leaf movements in the family Oxalidaceae. Contr. Bot. 
Lab. Univ. Pennsylvania 3: 211-242. pl. 3 +f. I-5. 1911. 
Waldron, L. R. Large and small seed experiment. Am. Breed. Assoc. 
6: 204-212. I911. 
Weingart, W. Cereus Purpusii Weingart. Monats. Kakteenk. 22: 
26-29. 15 F 1912. [Illust.] 
Weingart, W. Pilocereus scoparius Pos. Monats. Kakteenk. 22: 
45. 15 Mr 1912. 
Wester, P. J. The mango. Philip. Bur. Agr. Bull. 18: 1-60. pl. 1-9. 
Westgate, J. M., & Vinall, H. N. Sweet clover. U. S. Dept. Agr. 
Farm. Bull. 485: 5-39. f. 1-16. 12 Mr 1912. 
Williams, R. S. The genus Clastobrywm Doz. and Molk. in America. 
Bryologist 15: 31. Mr 1912. 
Wilson, P. Botanical exploration in Cuba. Jour. N. Y. Bot. Gard. 
13: 23-25.  I9t2. 
Peltostigma lel eoides. 
Wilson, P. The flowering of the Jamaica candle-wood tree. 
Yoel: Coued. 35: 28. 36:0: P1972; 
Wolf, F.A. Gummosis. Plant World 15: 60-66. Mr 1912. j 
Wolf, F. A. Some fungous diseases of the prickly pear, Opuntia Lind- 
heimeri Engelm. Ann. Myc. 10: 113-134. pl. 1-3 +f. 1-8. 1 AP 
1912. 
Wright, C. H. Flora of the Falkland Islands. Jour. Linn. Soc. Bot. 
39: 313-339. I911. 
York, H.H. The development of the flower, embryo sac, and embry? 
of Dendrophthora opuntioides and D. gracile(is]. Johns Hopkins 
Univ. Circ. 1912: 149-152. F 1912. 
Zahlbruckner, A. Schedae ad ‘‘ Kryptogamas exsiccatas.” 
Naturhist. Hofmus. 24: 269-292. 1910; 25: 223-252: 19th 
Includes notes on several species from America. 
Jour. N. 
Ann. 
